647425632 has 72 divisors (see below), whose sum is σ = 1976974776. Its totient is φ = 184977408.

The previous prime is 647425631. The next prime is 647425661. The reversal of 647425632 is 236524746.

647425632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647425631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64113 + ... + 73520.

It is an arithmetic number, because the mean of its divisors is an integer number (27457983).

Almost surely, 2^647425632 is an apocalyptic number.

It is an amenable number.

647425632 is an abundant number, since it is smaller than the sum of its proper divisors (1329549144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647425632 is a wasteful number, since it uses less digits than its factorization.

647425632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137660 (or 137645 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 647425632 is about 25444.5599686849. The cubic root of 647425632 is about 865.0939931496.

The spelling of 647425632 in words is "six hundred forty-seven million, four hundred twenty-five thousand, six hundred thirty-two".